Question

如何得到bp神经网络拟合后的函数表达式？ 曲线已经拟合出来了，函数表达式该如何获取

Answer 1

12345678910111213polyfitPolynomial curve fittingcollapse all in pageSyntaxp = polyfit(x,y,n)example[p,S] = polyfit(x,y,n)[p,S,mu] = polyfit(x,y,n)exampleDescriptionexamplep = polyfit(x,y,n) returns the coefficients for a polynomialp(x) of degree n that is a best fit (in a least-squares sense) for the data in y. The coefficients in p are in descending powers, and the length of p is n+1p(x)=p1xn+p2xn−1+...+pnx+pn+1.
matlab 里 help polyfit

追问

这是我已经拟合好的曲线图

神经网络拟合出来的，用polyfit行吗？